OWC DIY Kit for all Apple 21.5 "iMac 2011 Models for installing an internal SSD. Without tools. (Compatible models: iMac 21.5 inch 2011) Security Locks & Accessories - Newegg.com
Upgrade kit + tools iMac late 2013-2-2019|iMac PCIe NVME SSD|Flexx Memory|Free UK Delivery
$1000 mistake! How to upgrade iMac SSD & Thermal Sensor 2017 A1419 hard drive replacement - YouTube
How to: Install an Intel iMac Dual Hard Drive Kit 21.5" (Mid 2011) - YouTube
OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
OWC Complete Hard Drive Upgrade Kit for iMac OWCDIYIMACHDD09 B&H
Amazon.com: OWC SSD Upgrade Kit for 2011 21.5-inch iMacs, Mercury Electra 250GB 6G SSD, 18" SATA III 6Gbps Data Cable, Installation Tools and iMac Screen Adhesive Tape Set : Electronics
OWC Internal SSD DIY Kit For All Apple 21.5" iMac 2011 Models w/ Tools
OWC SSD Upgrade Kit iMac 21.5“ 2012-2019 - Tools only
OWC SSD Upgrade Bundle for 2012-2019 21.5" iMacs, OWC Mercury Electra 1.0TB 6G SSD, OWC Express 2.5" USB 3.0 HDD Enclosure, Installation Tools and iMac Screen Adhesive Tape Set (K21IM12HE1TB) Data Converters -